What is the specific process of car painting? What are the specific steps of car painting?

The traditional sheet metal painting process generally requires the following processes.

First, the sheet metal calibration is for the car sheet metal painting for the preliminary shaping work.

Second, scraping (molding) car body after sheet metal correction there are some defects that can not be compensated for sheet metal work, even if it is replaced with new parts, there will be unsatisfactory **, in order to achieve more perfect and refined, it is necessary to use the sculpture technology to compensate for the defects.

3. Automobile sheet metal painting: We usually divide the automobile sheet metal painting into 3 steps.

1. First primer: fill the sand marks and micropores at the bottom of the workpiece, increase the adhesion of the lower coating, and also have the effect of defect indication. -

2. Primer: Prepare a well-lubricated working surface for the topcoat, complete the last process of all primer work, increase the adhesion of the participating layer and have a certain isolation effect, so as to ensure the quality of the topcoat is not disorderly.

3. Topcoat: Topcoat is divided into single-layer paint and multi-layer paint, which is the color sure layer and the decorative maintenance layer.

Fourth, sheet metal spray paint paint disposal: paint disposal is the last process of the topcoat, to be dry and solid after the disposal of the defects on it, the best efforts will flow a department is not very satisfactory, then as long as the later make up, we call it mirror disposal. First use 1200-2000 mesh beauty sandpaper to stop leveling and grinding If necessary, you can use 2500 mesh, and then use coarse wax composed of pumice or clay components to stop grinding and cutting, and dispose of sandpaper traces, five:

The next step is to stop grinding with fine-cut wax without silicone, dispose of the coarse wax traces, and then dispose of it with a restorer to achieve a complete luster, and then use a mirror treatment agent to completely remove the halo and trowel marks.

What we say about "sheet metal spraying" in our daily life refers to sheet metal and spray painting. When a car collides, it will be slightly deformed or scratched. The maintenance master will reshape and repair the collision site to restore the collision site to the state before the collision as much as possible.

This process is known as sheet metal. After the shape of the car is restored, we also have to restore its color and gloss, and this process is painting.

Automobile sheet metal spraying is mainly the following steps:

1. Determine the plan.

The repair technician will determine the repair plan of the car based on the extent of its damage. If there is a serious deformation, it is possible to inspect and repair the engine, electrical circuits, and gearbox. At this time, the master in charge of the mechanic will first inspect, disassemble and repair these parts.

2. Sheet metal correction.

For parts that have been deformed, it is necessary to use appropriate repair equipment to restore them. In general, the sheet metal process is cut, sanded, stretched, reheated, and reoxygenated. Sheet metal must not only be restored to its original appearance, but also maintain the hardness of the metal as much as possible.

3. Scrape the ash and set the shape.

With current technology, no matter how advanced the maintenance equipment is, it cannot guarantee that the sheet metal is flawless. The rear surface of the sheet metal will more or less have some defects or traces of repair. Even if you replace a brand new part, there will be some imperfections.

At this time, the maintenance master will shape the waistline of the car body again and adjust its flatness by scraping the ash and shaping. This is a very technical restoration.

4. Spray paint.

Spraying paint is a work with high requirements for the working environment, which must be guaranteed to be a dust-free environment, and its process is also relatively cumbersome, mainly divided into: spraying the first primer, spraying the primer, grinding the primer, spraying the topcoat, drying the paint and other links.

5. Paint treatment.

The final step in sheet metal painting is to treat the finish. Even in a 4S shop, using the best equipment and skilled craftsmen to do the restoration, there will still be some small flaws left in the previous work. Even a little dust in the air can affect the effectiveness of car restoration.

At this time, it is necessary to do the paint treatment. In order to achieve a mirror-like finish, the most common remedy is to use very fine beauty sandpaper or a polishing machine to polish it. After the whole process is completed, the part of the car collision is basically the same as the original.

Paint booth spraying.

For whether to go to a 4S shop or a fast repair shop for repair, people often choose a 4S shop, but it is time-consuming and costly; Professional fast repair shop, fast speed, low cost, but the quality is more than 4S.

Hello The general process steps are as follows: cleaning, qualification and evaluation; masking and degreasing; Remove old paint and polish feathered edges; scrape putty; sanding putty to remove the old coating; Prime; sanding primer; sanding transition areas; Clean.

1.Treat the damaged area.

2.Scrape the ash.

3.Handling putty.

4.Primer spraying.

5.Paint finishing.

6.Pigment spraying is carried out.

7. Varnish spraying.

First of all, do a technical evaluation of the construction surface and make a construction plan, remove rust from bare iron, do feathered edge treatment of old paint film, and clean the construction surface.

Clean and remove oil, spray epoxy anti-rust primer, apply multi-functional putty, grind coarse putty, and finely grind multi-functional fine putty.

Putty Cleaning, Spraying two-component high-solidity primer, Spraying and grinding indicator layer, Drying, Fine grinding, Filling with trachoma putty

Fine grinding, cleaning the whole vehicle, thoroughly removing water, using electrostatic masking paper for shading, entering the paint room, cleaning and degreasing on the construction surface.

Thorough dusting of the working surface Must use a scale to adjust the amount of paint, spray 2 to 3 layers of metallic paint, 2 layers of HS environmentally friendly high-solid varnish.

This step can be omitted for baking paint) After drying, inspect the paint surface and polish the flawed areas and clean them.

And deliver the car.

1. Determine the painting area.

Whether it is a small scratch or a serious paint loss, if you decide to paint, then the whole area is to be sprayed, such as a scratch in the lower right corner of the front bumper, then the entire bumper must be repainted. The painting area is divided according to the accessories, such as doors, fenders, bumpers, hoods, roofs, etc.

2. Paint polishing body sheet metal.

Once the paint area has been identified, the painting work begins. Depending on the damage to the paint, if sheet metal is required, the defective paint surface is sanded with a sander until the sheet metal is exposed. After that, the treated paint surface needs to be cleaned.

3. Scrape putty for leveling.

Putty, that is, putty, is generally red or light yellow, scraping putty is mainly to ensure that the paint surface is smooth and make up for the paint dents, under normal circumstances, the putty scraping operation needs about 3 times.

4. Grind and dry the putty layer.

After the putty layer is dried, it also needs to be polished with fine sandpaper to ensure the smoothness and uniform thickness of the putty layer, and the grinding method is generally water grinding, that is, fine sandpaper is dipped in water for grinding, and now there is also a more advanced dust-free dry grinding technology, which also minimizes the possibility of bubbles and sand marks that may be produced by water mill. Scraping several layers of putty requires grinding several times to ensure that the putty layer is flat and then dried naturally or dried with a paint lamp, and then it enters the next stage.

5. The paint surface is simple to protect and spray primer.

The painting operation needs to be carried out in the paint baking room, and the painting process needs to be absolutely dust-free. The primer is mainly sprayed here, in order to cover the color of the putty layer and provide better adhesion for the subsequent base coat spraying. Some painting workshops will omit this step and spray the base coat directly on the putty layer, the adhesion of the topcoat is not strong, and it is easier to crack after a long time.

After the primer is sprayed, the paint surface needs to be further checked to ensure smoothness.

After the first spray, you can check whether there is anything wrong with the bottom so that it is easy to deal with.

The second coat of paint is evenly sprayed wet.

After the first spray inspection is not faulty, the wet spray directly covers the bottom, and the wet spray is for the color paint to be smooth and not rough, and the pearl color paint looks more uniform.

The third coat of color paint is sprayed with a uniform mist.

After the fog spray, the color paint basically reaches the fullness of this method spray** gray silver is not easy to spend.

The first time the varnish is sprayed, the gun is pressed halfway, the speed is slightly faster, and the spray is evenly sprayed, which can reduce the flash drying time, save the varnish, and it is not easy to sag.

The varnish is applied for the second time by compaction spraying.

The air pressure is large, the fan is open, the gun is pressed to the end, evenly and slowly compacted, sprayed, and the gloss is seen while pressing, and the gloss is pressed until the luster is satisfied.

That's the basics of the painting process.

The next step is the over-color spraying method.

The paint surface is sanded with 3M2000 or cauliflower cloth with grinding liquid.

Spray the resin on the first pass to eliminate sandpaper marks.

The range of color paint can be sprayed smaller, try to spray smaller, like I sprayed to the white frame range, and then tear the newspaper to compare (this color is not on the varnish, you can't see it, don't spray).

After the paint is good, the varnish is directly cleared.

Hope it helps, dear

1. Cleaning: first clean the surface of the car comprehensively, remove dust and debris, and determine the maintenance process.

2. Oiling: Oiling the area to be painted.

3. Grinding: Choose the right sandpaper to polish the parts that need to be painted, and be sure to smooth all the paint.

4. Scraping putty: When all the paint is sanded off, you can use putty to scrape.

5. Clean and cover After the putty is scraped, use an air gun to blow off the dust and impurities on the surface to prevent the paint from splashing.

6. Painting: At this time, the paint that has been debugged in advance will be sprayed, and the painting can be completed in 3-5 times.

7. Trimming: After the paint is dry, polish and trim the uneven places to make them natural.

1. Check whether the body parts are deformed, and the deformed ones should be pulled and shaped.

2. After shaping, the gold putty should be scraped.

3. The first part is sanded with No. 80 sandpaper.

4. Then scrape the shape, and use 80 sandpaper to polish the shape.

5. After grinding, scrape a thin layer of putty and polish it with No. 240.

6. After grinding, scrape a layer of putty for finishing, and polish it with No. 600 sandpaper.

7. After grinding, see if there is sandpaper print and trachoma, use special eyefill ash for eye filling, and polish with 800 sandpaper.

8. Use No. 1500 sandpaper to polish the parts that need to be painted.

9. Wipe the painted area with degreaser.

10. Start spraying primer, generally spraying primer 3-4 can be made.

11. Wait for the primer to dry slightly, spray varnish, and spray 2-3 varnish preparations.

12.Painting must be carried out in a dedicated paint booth. Satisfied.

The process of car painting is generally divided into seven steps, which are 1Clean, clean the surface of the car to remove dust and debris! 2, Oiled 3

Grinding 4Scrape putty 5Clean and cover 6

Spray paint 7Dressing!

Hello, very happy with your question, the process of painting is first of all to need sheet metal to flatten the concave and convex surface, and then spray paint, Deneb emperor is Gua Gaohui. Then the second Gao Hui scraped, and then the putty had to be scraped, and the third one needed to be treated with rust, and then the fourth one was sprayed into one of our bottoms, seven.

The car is putty and then painted.

The steps of automobile painting include a total of 23 processes

1) The car body is rust prevention and internal spraying: depending on the body condition, it will be completed by the sheet metal worker.

2) Grinding and retouching the beveled edge: Use P60 180 sandpaper to polish the parts of the body that have been repaired by sheet metal and need putty.

3) Dust removal and cleaning: Use pressure guns and silicone cleaners to remove fine dust and stains on the body.

4) Patching: Use the reverse sticking technique to paste the masking paper.

5) Painting primer: Mix 4:1 red primer and spray 1 2 layers of sanding on the exposed metal position, and then dry.

6) Fill putty: Fill the hollow position of the mixed multi-functional putty on the body and place it in an environment of 20 degrees Celsius for 30 minutes.

7) Sanding putty: Use P60 240 sandpaper to sand, check the flatness, pinholes and imprints with the feel or sanding indicator layer.

8) Extra young putty: use when necessary, fill pinholes, sandpaper marks, etc.

9) Sanding: Use P280 sandpaper to thoroughly polish the old paint that needs to be sprayed with intermediate paint on the body.

10) Dust removal and cleaning: Use pressure gun and silicon detergent to remove dust and stains on the body.

11) Wrapping: Paste the masking paper.

12) Spraying intermediate paint: Mix 2 3 layers of multi-functional intermediate paint, each layer is spaced for 5 10 minutes, then dry at 60 degrees Celsius for 30 minutes, and then spray the grinding indicator layer.

13) Sanding intermediate paint: Use P320 400 sandpaper to polish the dried intermediate paint.

14) Inspection: Check the grinding effect, you can do micro-filling.

15) Dust removal and cleaning: remove dust and stains from the car body.

16) Care: Cover the car body.

17) Dust removal and cleaning: first blow out the dust spots on the body with a pressure gun, remove the stains on the body with a silicone cleaner, blow out the dust from the gaps in the body with a pressure gun, and finally use a sticky dust cloth to remove the fine dust on the body.

18) Spray plain paint on topcoat: spray 2 3 layers, each layer is spaced 5 10 minutes apart, and add curing agent and thinner according to the temperature.

19) Spraying base paint: spray 2 3 layers of plain paint, silver powder paint or pearl paint, each layer with an interval of 5 10 minutes.

20) Varnish spraying: Mix and spray two layers of varnish, each layer at an interval of 5 to 10 minutes, and add curing agent and diluent according to the temperature.

21) Bake dry: Let stand for 5 10 minutes, dry at 60 degrees Celsius for 30 minutes. Drying and curing need to be judged, if it feels sticky to the touch of the finger, it is dry surface, if it does not leave finger marks when it is lightly touched, it is semi-hard dry, and if it is pressed without finger marks, it is completely dry.

22) Waxing and polishing.

23) Cover the car. The purpose of covering a car is to prevent spray from being sprayed where it shouldn't, and the regular basic masking materials are masking paper and masking tape. The width of the car masking paper varies from 7cm to 91cm, it is heat-resistant, it is generally safe to use in the drying room, and its wet strength is good, which prevents solvent penetration (Note:

It cannot be covered with newspapers, which are not very heat-resistant and contain printing inks, which will dissolve in the paint solvent and penetrate into the topcoat below, causing pollution).

The above is mine, I hope it helps you, hope!